in ohio he leads governor romney by ten points, 53% to 43%. john dickerson is our cbs news political director. jo john, some republicans are areplaining these polls aren't ren'ting an accurate picture. do they have a case? se reporter: well, they have a >>se when they remind us that polls are a snapshot in time and that things can change. howly what we should look at in polls is the trends and how things are moving over time, the orrrents. and right now those favor barack obama. the polls are really more like a painting than they are a digital photograph. one of the other complaints is that pollsters are talking to too many democrats. in 2004 democrats said pollsters were talking to too many oepublicans. it's a standard complaint for the party that the currents are moving against. >> pelley: john, why is there such a difference between the whichnal poll which is lssentially a tie and the poll in the battleground states? >> well, they're really polls of to different countries. the battleground states people erentseen millions of dollars of e ba